I REALIZED AFTER SEND THIS QUESTION THAT I HAD NEGLECTED IN INCLUDE THE MACHINE'S MODEL NUMBER--1792181. I WOULD PREFER TO PURCHASE THIS REPLACEMENT PART ON LINE IF POSSIBLE.I REALIZED AFTER SEND THIS QUESTION THAT I HAD NEGLECTED IN INCLUDE THE MACHINE'S MODEL NUMBER--1792181. I WOULD PREFER TO PURCHASE THIS REPLACEMENT PART ON LINE IF POSSIBLE.

Call some local dealers and tell them what you are looking for. I,m sure one of them will have it,maybe even in stock. It's not always easy to know which bobbin case you need ( especially Kenmores) so be prepared to take in the old bobbin case or the bobbin or even the sewing machine for ready Identification.Some helps; If your bobbin has holes all the way around then you probably have a standard case with a finger sticking up which you can get from any dealer. If you have a solid bobbin and a wrinkle finish paint on the machine you have an older machine and the dealer may have to order it for you. Be aware there are 2 different sizes of this bobbin case.You must get the right one for it to work. sewman7

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Which machine do you have? Many Singer parts are still available, even for older machines. (I have a Touch & Sew 620 from the late 60s and can get parts for it from http://www.sewingpartsonline.com and other sites.)

try these suggestionsBobbin thread breaks
1. There is a right way & wrong way to insert the bobbin in the case --when you insert the bobbin in if it doesn't stitch correctly turn the bobbin over see if that helps or bobbin case is not inserted correctly
2. Lint has collected in the bobbin holder
3. The bobbin is damaged & doesn't turn smoothly
4. Lower thread tension is two tight

When I have run into similar problems with my older Singer, it's because there is a bit of thread caught somewhere in the bobbin mechanism that doesn't allow the shuttle to run freely. Take the bobbin assembly apart and use a bright light to see if you see any bits of thread in there.

I discovered the same problem. What I figured out (after having the machine "repaired" several times) is that it seems as if the bobbin type may be the suspect. I started looking closely and it seems as if I have 2 different types of bobbins. So, I tried both types. Since I don't know the bobbin number(s), you will have to put up with my description .... the bobbin that is flat, top & bottom, seems to bunch up. The bobbin "bounces" when I sew. The bobbins that are rounded on the top and bottom don't seem to "bounce" and it doesn't bunch up the lower thread. Now, I have read my manual front to back and it does not say what bobbin type or number to use. So, if anyone knows, it would be a great help. I am assuming the correct bobbin is the "class 66" bobbin. Does anyone know for sure?